Envelop-opener.



0. A. ROED. ENVELOP OPENER.

APPLICATION FILED JUNE 23, 1909. Patented Apr. 12, 1910.

IN VEN TOR. 0/]. 0m

WITNESSES.- JA CLAW QLAE: A. norm, or DENVER, COLORADO;

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Specification of Letters Patent;

Patented A i 12, 1910.

Application filed June 23, 1905).' Serial No. 503,926.

To all whom it mdy concern:

Be it known that I, OLAF A. Bonn, a citigen of the United States of America, residmg at Denver, in the county .of Denver and State of Colorado, have invented certain new and useful Improvements in Envelopcation.

This invention relates to improvements in envelop openers and it has for its object the provision of a device of the class named in which simplicity of construction is combined with great practicability in use.

I attain this object by the mechanism illustrated in the accompanying drawings in the various views of which like parts are similarly designated and in which' Figure 1, represents a plan view of the device, Fig. 2, an end view looking in the direction of the arrow a Fig. 1, and Fig. 3, a transverse section taken along the line 33 Fig. 1.

My improved envelop-opener, as illustrated in the drawings, comprises a flat base 5 preferably formed with upturned edges and provided at its opposite ends, with vertically extending, apertured lugs 5 upon which the movable cutting member 6 is pivotally secured by means of bolts 7. S rings 8 whose normally divergent, termina portions engage the opposite inner surfaces of Openers, of which the following is a specifithe members 5 and 6, serve to resiliently maintain the moving member in its normal position with relation to the base upon which it is supported. The cutting member 6 consists o a flat plate provided with downwardly extending parallel sides 6? through which the bolts? project, and it has at its foremost side a bent flange 6 upon which a bevel edged cutting blade 9 is rigidly secured. The side of the base 5 corresponding with the flanged-side of the member 6 has an upwardly projecting flange 5 the upper edge of which is curved in correspondence with a heliciform bevel edged blade 10.

When the blade 9 is in its normally, lowermost position as shown in the drawings, the'lower end of the blade 10 extends in s'uperposed relation to the cutting edge thereof, the'distance between the two blades being sufiiciently large to permit the insertion of an envelop between them. The blade 10 curves from its lower end helical-1y up and inwardly be end the arc of travel of the cutting edge 0 the rectilinear blade 9, and the flange 5 on the member 5- having been made sufficientlythin to be elastic, a frictional contact of gradually increasing stress between the two cutting edges of tie blades is as sured during the movement of the blade 9 of the pivoted member 6.

-In the operation of my improved device,

upon the upthe envelop to be opened is lai per surface of the member 6 with one of its edges projecting between the two blades and in engagement with the inner surface of the flange 5.

uppermost side and the doubled edge of'the envelop is during said movement separated The member .6 is now moved about its pivot by pressure applied upon its from its body portion by the shearing action of the cutting blade '9 'in cooperation with the relatively stationaryblade 10. The base 5 ofthe contrivance may if so desired, be

fastened upon a stationary support 'such as a table or desk and with but little practice on the part of the operator, the device may" be utilized to open envelops with great. rapidity, theinfallibility of the operation.

being assured. by the helicoidal shape of the fixed cutting blade and its state of intersection with the arc of travel of the movable blade.

Having thus described my invention what I claim and desire to protect by Letters Patent is i 1. An envelop-0pener comprising a base member having an upturned resilient flange and a heliciform cutting blade at the upper edge thereof, and a normally inclined envelop supporting plate pivotally connected with said base member and having at one of its sides a-rectiliriearblade extending normallybelow the helical blade so as to shearingly pass the same during the movement of the plate of which it forms part.

2. An envelop-opener comprising a base member having an upturned resilient flange and a heliciform cutting blade at the upper edge thereof, and a normally inclined cn-. velop-supporting plate, pivotally connected .with said base member and having at one of member having'an upturned resilientflange and aliel'iciform cuttin blade at the upper ranged to resiliently maintain said plate in edge thereof, a norma ly inclined envelop its normal position. I 10 supporting plate, pivotally connected with In testimony whereof I aflix my'signature said base member and having at one of its inpres ence of two witnesses. 5' sides a: rectilinear blade extending normally OLAF A.-ROED. below the helical blade so as to shearingly Witnesses:

pass the'same during the movement of the G. J. :ROLLANDET,

' plateof whieh it forms part ands'prings a'r- M. L. GEARY. 

